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Molecular structures of macrolides bistramide A, reidispongiolide A, sphinxolide B, reidispongiolide C (the macrolide tail of reidispongiolide C differs from that of reidispongiolide A and sphinxolide B in the boxed region), kabiramide C, jaspisamide A, ulapualide A (which share a trisoxazole macrolide ring), and aplyronine A that bind to the gelsolin binding site on actin.
